Update client/main.lua

[wanderrer]

Adding language support enabling multiple translations to be available.

Questions (please complete the following information):

• Have you personally loaded this code into an updated qbcore project and checked all it's functionality? [yes/no] yes
• Does your code fit the style guidelines? [yes/no] yes
• Does your PR fit the contribution guidelines? [yes/no] yes

[tom-osborne]

This was covered in #47